Andrew's git / gitweb.git / builtin/rev-parse.c
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builtin / rev-parse.con commit Merge branch 'nv/parseopt-opt-arg' (3576f11)
   1/*
   2 * rev-parse.c
   3 *
   4 * Copyright (C) Linus Torvalds, 2005
   5 */
   6#include "cache.h"
   7#include "commit.h"
   8#include "refs.h"
   9#include "quote.h"
  10#include "builtin.h"
  11#include "parse-options.h"
  12
  13#define DO_REVS         1
  14#define DO_NOREV        2
  15#define DO_FLAGS        4
  16#define DO_NONFLAGS     8
  17static int filter = ~0;
  18
  19static const char *def;
  20
  21#define NORMAL 0
  22#define REVERSED 1
  23static int show_type = NORMAL;
  24
  25#define SHOW_SYMBOLIC_ASIS 1
  26#define SHOW_SYMBOLIC_FULL 2
  27static int symbolic;
  28static int abbrev;
  29static int abbrev_ref;
  30static int abbrev_ref_strict;
  31static int output_sq;
  32
  33static int stuck_long;
  34
  35/*
  36 * Some arguments are relevant "revision" arguments,
  37 * others are about output format or other details.
  38 * This sorts it all out.
  39 */
  40static int is_rev_argument(const char *arg)
  41{
  42        static const char *rev_args[] = {
  43                "--all",
  44                "--bisect",
  45                "--dense",
  46                "--branches=",
  47                "--branches",
  48                "--header",
  49                "--ignore-missing",
  50                "--max-age=",
  51                "--max-count=",
  52                "--min-age=",
  53                "--no-merges",
  54                "--min-parents=",
  55                "--no-min-parents",
  56                "--max-parents=",
  57                "--no-max-parents",
  58                "--objects",
  59                "--objects-edge",
  60                "--parents",
  61                "--pretty",
  62                "--remotes=",
  63                "--remotes",
  64                "--glob=",
  65                "--sparse",
  66                "--tags=",
  67                "--tags",
  68                "--topo-order",
  69                "--date-order",
  70                "--unpacked",
  71                NULL
  72        };
  73        const char **p = rev_args;
  74
  75        /* accept -<digit>, like traditional "head" */
  76        if ((*arg == '-') && isdigit(arg[1]))
  77                return 1;
  78
  79        for (;;) {
  80                const char *str = *p++;
  81                int len;
  82                if (!str)
  83                        return 0;
  84                len = strlen(str);
  85                if (!strcmp(arg, str) ||
  86                    (str[len-1] == '=' && !strncmp(arg, str, len)))
  87                        return 1;
  88        }
  89}
  90
  91/* Output argument as a string, either SQ or normal */
  92static void show(const char *arg)
  93{
  94        if (output_sq) {
  95                int sq = '\'', ch;
  96
  97                putchar(sq);
  98                while ((ch = *arg++)) {
  99                        if (ch == sq)
 100                                fputs("'\\'", stdout);
 101                        putchar(ch);
 102                }
 103                putchar(sq);
 104                putchar(' ');
 105        }
 106        else
 107                puts(arg);
 108}
 109
 110/* Like show(), but with a negation prefix according to type */
 111static void show_with_type(int type, const char *arg)
 112{
 113        if (type != show_type)
 114                putchar('^');
 115        show(arg);
 116}
 117
 118/* Output a revision, only if filter allows it */
 119static void show_rev(int type, const unsigned char *sha1, const char *name)
 120{
 121        if (!(filter & DO_REVS))
 122                return;
 123        def = NULL;
 124
 125        if ((symbolic || abbrev_ref) && name) {
 126                if (symbolic == SHOW_SYMBOLIC_FULL || abbrev_ref) {
 127                        unsigned char discard[20];
 128                        char *full;
 129
 130                        switch (dwim_ref(name, strlen(name), discard, &full)) {
 131                        case 0:
 132                                /*
 133                                 * Not found -- not a ref.  We could
 134                                 * emit "name" here, but symbolic-full
 135                                 * users are interested in finding the
 136                                 * refs spelled in full, and they would
 137                                 * need to filter non-refs if we did so.
 138                                 */
 139                                break;
 140                        case 1: /* happy */
 141                                if (abbrev_ref)
 142                                        full = shorten_unambiguous_ref(full,
 143                                                abbrev_ref_strict);
 144                                show_with_type(type, full);
 145                                break;
 146                        default: /* ambiguous */
 147                                error("refname '%s' is ambiguous", name);
 148                                break;
 149                        }
 150                } else {
 151                        show_with_type(type, name);
 152                }
 153        }
 154        else if (abbrev)
 155                show_with_type(type, find_unique_abbrev(sha1, abbrev));
 156        else
 157                show_with_type(type, sha1_to_hex(sha1));
 158}
 159
 160/* Output a flag, only if filter allows it. */
 161static int show_flag(const char *arg)
 162{
 163        if (!(filter & DO_FLAGS))
 164                return 0;
 165        if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
 166                show(arg);
 167                return 1;
 168        }
 169        return 0;
 170}
 171
 172static int show_default(void)
 173{
 174        const char *s = def;
 175
 176        if (s) {
 177                unsigned char sha1[20];
 178
 179                def = NULL;
 180                if (!get_sha1(s, sha1)) {
 181                        show_rev(NORMAL, sha1, s);
 182                        return 1;
 183                }
 184        }
 185        return 0;
 186}
 187
 188static int show_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
 189{
 190        show_rev(NORMAL, sha1, refname);
 191        return 0;
 192}
 193
 194static int anti_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
 195{
 196        show_rev(REVERSED, sha1, refname);
 197        return 0;
 198}
 199
 200static int show_abbrev(const unsigned char *sha1, void *cb_data)
 201{
 202        show_rev(NORMAL, sha1, NULL);
 203        return 0;
 204}
 205
 206static void show_datestring(const char *flag, const char *datestr)
 207{
 208        static char buffer[100];
 209
 210        /* date handling requires both flags and revs */
 211        if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
 212                return;
 213        snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
 214        show(buffer);
 215}
 216
 217static int show_file(const char *arg, int output_prefix)
 218{
 219        show_default();
 220        if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
 221                if (output_prefix) {
 222                        const char *prefix = startup_info->prefix;
 223                        show(prefix_filename(prefix,
 224                                             prefix ? strlen(prefix) : 0,
 225                                             arg));
 226                } else
 227                        show(arg);
 228                return 1;
 229        }
 230        return 0;
 231}
 232
 233static int try_difference(const char *arg)
 234{
 235        char *dotdot;
 236        unsigned char sha1[20];
 237        unsigned char end[20];
 238        const char *next;
 239        const char *this;
 240        int symmetric;
 241        static const char head_by_default[] = "HEAD";
 242
 243        if (!(dotdot = strstr(arg, "..")))
 244                return 0;
 245        next = dotdot + 2;
 246        this = arg;
 247        symmetric = (*next == '.');
 248
 249        *dotdot = 0;
 250        next += symmetric;
 251
 252        if (!*next)
 253                next = head_by_default;
 254        if (dotdot == arg)
 255                this = head_by_default;
 256
 257        if (this == head_by_default && next == head_by_default &&
 258            !symmetric) {
 259                /*
 260                 * Just ".."?  That is not a range but the
 261                 * pathspec for the parent directory.
 262                 */
 263                *dotdot = '.';
 264                return 0;
 265        }
 266
 267        if (!get_sha1_committish(this, sha1) && !get_sha1_committish(next, end)) {
 268                show_rev(NORMAL, end, next);
 269                show_rev(symmetric ? NORMAL : REVERSED, sha1, this);
 270                if (symmetric) {
 271                        struct commit_list *exclude;
 272                        struct commit *a, *b;
 273                        a = lookup_commit_reference(sha1);
 274                        b = lookup_commit_reference(end);
 275                        exclude = get_merge_bases(a, b, 1);
 276                        while (exclude) {
 277                                struct commit_list *n = exclude->next;
 278                                show_rev(REVERSED,
 279                                         exclude->item->object.sha1,NULL);
 280                                free(exclude);
 281                                exclude = n;
 282                        }
 283                }
 284                return 1;
 285        }
 286        *dotdot = '.';
 287        return 0;
 288}
 289
 290static int try_parent_shorthands(const char *arg)
 291{
 292        char *dotdot;
 293        unsigned char sha1[20];
 294        struct commit *commit;
 295        struct commit_list *parents;
 296        int parents_only;
 297
 298        if ((dotdot = strstr(arg, "^!")))
 299                parents_only = 0;
 300        else if ((dotdot = strstr(arg, "^@")))
 301                parents_only = 1;
 302
 303        if (!dotdot || dotdot[2])
 304                return 0;
 305
 306        *dotdot = 0;
 307        if (get_sha1_committish(arg, sha1))
 308                return 0;
 309
 310        if (!parents_only)
 311                show_rev(NORMAL, sha1, arg);
 312        commit = lookup_commit_reference(sha1);
 313        for (parents = commit->parents; parents; parents = parents->next)
 314                show_rev(parents_only ? NORMAL : REVERSED,
 315                                parents->item->object.sha1, arg);
 316
 317        return 1;
 318}
 319
 320static int parseopt_dump(const struct option *o, const char *arg, int unset)
 321{
 322        struct strbuf *parsed = o->value;
 323        if (unset)
 324                strbuf_addf(parsed, " --no-%s", o->long_name);
 325        else if (o->short_name && (o->long_name == NULL || !stuck_long))
 326                strbuf_addf(parsed, " -%c", o->short_name);
 327        else
 328                strbuf_addf(parsed, " --%s", o->long_name);
 329        if (arg) {
 330                if (!stuck_long)
 331                        strbuf_addch(parsed, ' ');
 332                else if (o->long_name)
 333                        strbuf_addch(parsed, '=');
 334                sq_quote_buf(parsed, arg);
 335        }
 336        return 0;
 337}
 338
 339static const char *skipspaces(const char *s)
 340{
 341        while (isspace(*s))
 342                s++;
 343        return s;
 344}
 345
 346static int cmd_parseopt(int argc, const char **argv, const char *prefix)
 347{
 348        static int keep_dashdash = 0, stop_at_non_option = 0;
 349        static char const * const parseopt_usage[] = {
 350                N_("git rev-parse --parseopt [options] -- [<args>...]"),
 351                NULL
 352        };
 353        static struct option parseopt_opts[] = {
 354                OPT_BOOL(0, "keep-dashdash", &keep_dashdash,
 355                                        N_("keep the `--` passed as an arg")),
 356                OPT_BOOL(0, "stop-at-non-option", &stop_at_non_option,
 357                                        N_("stop parsing after the "
 358                                           "first non-option argument")),
 359                OPT_BOOL(0, "stuck-long", &stuck_long,
 360                                        N_("output in stuck long form")),
 361                OPT_END(),
 362        };
 363
 364        struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
 365        const char **usage = NULL;
 366        struct option *opts = NULL;
 367        int onb = 0, osz = 0, unb = 0, usz = 0;
 368
 369        strbuf_addstr(&parsed, "set --");
 370        argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
 371                             PARSE_OPT_KEEP_DASHDASH);
 372        if (argc < 1 || strcmp(argv[0], "--"))
 373                usage_with_options(parseopt_usage, parseopt_opts);
 374
 375        /* get the usage up to the first line with a -- on it */
 376        for (;;) {
 377                if (strbuf_getline(&sb, stdin, '\n') == EOF)
 378                        die("premature end of input");
 379                ALLOC_GROW(usage, unb + 1, usz);
 380                if (!strcmp("--", sb.buf)) {
 381                        if (unb < 1)
 382                                die("no usage string given before the `--' separator");
 383                        usage[unb] = NULL;
 384                        break;
 385                }
 386                usage[unb++] = strbuf_detach(&sb, NULL);
 387        }
 388
 389        /* parse: (<short>|<short>,<long>|<long>)[=?]? SP+ <help> */
 390        while (strbuf_getline(&sb, stdin, '\n') != EOF) {
 391                const char *s;
 392                struct option *o;
 393
 394                if (!sb.len)
 395                        continue;
 396
 397                ALLOC_GROW(opts, onb + 1, osz);
 398                memset(opts + onb, 0, sizeof(opts[onb]));
 399
 400                o = &opts[onb++];
 401                s = strchr(sb.buf, ' ');
 402                if (!s || *sb.buf == ' ') {
 403                        o->type = OPTION_GROUP;
 404                        o->help = xstrdup(skipspaces(sb.buf));
 405                        continue;
 406                }
 407
 408                o->type = OPTION_CALLBACK;
 409                o->help = xstrdup(skipspaces(s));
 410                o->value = &parsed;
 411                o->flags = PARSE_OPT_NOARG;
 412                o->callback = &parseopt_dump;
 413                while (s > sb.buf && strchr("*=?!", s[-1])) {
 414                        switch (*--s) {
 415                        case '=':
 416                                o->flags &= ~PARSE_OPT_NOARG;
 417                                break;
 418                        case '?':
 419                                o->flags &= ~PARSE_OPT_NOARG;
 420                                o->flags |= PARSE_OPT_OPTARG;
 421                                break;
 422                        case '!':
 423                                o->flags |= PARSE_OPT_NONEG;
 424                                break;
 425                        case '*':
 426                                o->flags |= PARSE_OPT_HIDDEN;
 427                                break;
 428                        }
 429                }
 430
 431                if (s - sb.buf == 1) /* short option only */
 432                        o->short_name = *sb.buf;
 433                else if (sb.buf[1] != ',') /* long option only */
 434                        o->long_name = xmemdupz(sb.buf, s - sb.buf);
 435                else {
 436                        o->short_name = *sb.buf;
 437                        o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
 438                }
 439        }
 440        strbuf_release(&sb);
 441
 442        /* put an OPT_END() */
 443        ALLOC_GROW(opts, onb + 1, osz);
 444        memset(opts + onb, 0, sizeof(opts[onb]));
 445        argc = parse_options(argc, argv, prefix, opts, usage,
 446                        (keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0) |
 447                        (stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0) |
 448                        PARSE_OPT_SHELL_EVAL);
 449
 450        strbuf_addf(&parsed, " --");
 451        sq_quote_argv(&parsed, argv, 0);
 452        puts(parsed.buf);
 453        return 0;
 454}
 455
 456static int cmd_sq_quote(int argc, const char **argv)
 457{
 458        struct strbuf buf = STRBUF_INIT;
 459
 460        if (argc)
 461                sq_quote_argv(&buf, argv, 0);
 462        printf("%s\n", buf.buf);
 463        strbuf_release(&buf);
 464
 465        return 0;
 466}
 467
 468static void die_no_single_rev(int quiet)
 469{
 470        if (quiet)
 471                exit(1);
 472        else
 473                die("Needed a single revision");
 474}
 475
 476static const char builtin_rev_parse_usage[] =
 477N_("git rev-parse --parseopt [options] -- [<args>...]\n"
 478   "   or: git rev-parse --sq-quote [<arg>...]\n"
 479   "   or: git rev-parse [options] [<arg>...]\n"
 480   "\n"
 481   "Run \"git rev-parse --parseopt -h\" for more information on the first usage.");
 482
 483int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 484{
 485        int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
 486        int output_prefix = 0;
 487        unsigned char sha1[20];
 488        const char *name = NULL;
 489
 490        if (argc > 1 && !strcmp("--parseopt", argv[1]))
 491                return cmd_parseopt(argc - 1, argv + 1, prefix);
 492
 493        if (argc > 1 && !strcmp("--sq-quote", argv[1]))
 494                return cmd_sq_quote(argc - 2, argv + 2);
 495
 496        if (argc > 1 && !strcmp("-h", argv[1]))
 497                usage(builtin_rev_parse_usage);
 498
 499        prefix = setup_git_directory();
 500        git_config(git_default_config, NULL);
 501        for (i = 1; i < argc; i++) {
 502                const char *arg = argv[i];
 503
 504                if (as_is) {
 505                        if (show_file(arg, output_prefix) && as_is < 2)
 506                                verify_filename(prefix, arg, 0);
 507                        continue;
 508                }
 509                if (!strcmp(arg,"-n")) {
 510                        if (++i >= argc)
 511                                die("-n requires an argument");
 512                        if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
 513                                show(arg);
 514                                show(argv[i]);
 515                        }
 516                        continue;
 517                }
 518                if (!prefixcmp(arg, "-n")) {
 519                        if ((filter & DO_FLAGS) && (filter & DO_REVS))
 520                                show(arg);
 521                        continue;
 522                }
 523
 524                if (*arg == '-') {
 525                        if (!strcmp(arg, "--")) {
 526                                as_is = 2;
 527                                /* Pass on the "--" if we show anything but files.. */
 528                                if (filter & (DO_FLAGS | DO_REVS))
 529                                        show_file(arg, 0);
 530                                continue;
 531                        }
 532                        if (!strcmp(arg, "--default")) {
 533                                def = argv[i+1];
 534                                i++;
 535                                continue;
 536                        }
 537                        if (!strcmp(arg, "--prefix")) {
 538                                prefix = argv[i+1];
 539                                startup_info->prefix = prefix;
 540                                output_prefix = 1;
 541                                i++;
 542                                continue;
 543                        }
 544                        if (!strcmp(arg, "--revs-only")) {
 545                                filter &= ~DO_NOREV;
 546                                continue;
 547                        }
 548                        if (!strcmp(arg, "--no-revs")) {
 549                                filter &= ~DO_REVS;
 550                                continue;
 551                        }
 552                        if (!strcmp(arg, "--flags")) {
 553                                filter &= ~DO_NONFLAGS;
 554                                continue;
 555                        }
 556                        if (!strcmp(arg, "--no-flags")) {
 557                                filter &= ~DO_FLAGS;
 558                                continue;
 559                        }
 560                        if (!strcmp(arg, "--verify")) {
 561                                filter &= ~(DO_FLAGS|DO_NOREV);
 562                                verify = 1;
 563                                continue;
 564                        }
 565                        if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
 566                                quiet = 1;
 567                                continue;
 568                        }
 569                        if (!strcmp(arg, "--short") ||
 570                            !prefixcmp(arg, "--short=")) {
 571                                filter &= ~(DO_FLAGS|DO_NOREV);
 572                                verify = 1;
 573                                abbrev = DEFAULT_ABBREV;
 574                                if (arg[7] == '=')
 575                                        abbrev = strtoul(arg + 8, NULL, 10);
 576                                if (abbrev < MINIMUM_ABBREV)
 577                                        abbrev = MINIMUM_ABBREV;
 578                                else if (40 <= abbrev)
 579                                        abbrev = 40;
 580                                continue;
 581                        }
 582                        if (!strcmp(arg, "--sq")) {
 583                                output_sq = 1;
 584                                continue;
 585                        }
 586                        if (!strcmp(arg, "--not")) {
 587                                show_type ^= REVERSED;
 588                                continue;
 589                        }
 590                        if (!strcmp(arg, "--symbolic")) {
 591                                symbolic = SHOW_SYMBOLIC_ASIS;
 592                                continue;
 593                        }
 594                        if (!strcmp(arg, "--symbolic-full-name")) {
 595                                symbolic = SHOW_SYMBOLIC_FULL;
 596                                continue;
 597                        }
 598                        if (!prefixcmp(arg, "--abbrev-ref") &&
 599                            (!arg[12] || arg[12] == '=')) {
 600                                abbrev_ref = 1;
 601                                abbrev_ref_strict = warn_ambiguous_refs;
 602                                if (arg[12] == '=') {
 603                                        if (!strcmp(arg + 13, "strict"))
 604                                                abbrev_ref_strict = 1;
 605                                        else if (!strcmp(arg + 13, "loose"))
 606                                                abbrev_ref_strict = 0;
 607                                        else
 608                                                die("unknown mode for %s", arg);
 609                                }
 610                                continue;
 611                        }
 612                        if (!strcmp(arg, "--all")) {
 613                                for_each_ref(show_reference, NULL);
 614                                continue;
 615                        }
 616                        if (!prefixcmp(arg, "--disambiguate=")) {
 617                                for_each_abbrev(arg + 15, show_abbrev, NULL);
 618                                continue;
 619                        }
 620                        if (!strcmp(arg, "--bisect")) {
 621                                for_each_ref_in("refs/bisect/bad", show_reference, NULL);
 622                                for_each_ref_in("refs/bisect/good", anti_reference, NULL);
 623                                continue;
 624                        }
 625                        if (!prefixcmp(arg, "--branches=")) {
 626                                for_each_glob_ref_in(show_reference, arg + 11,
 627                                        "refs/heads/", NULL);
 628                                continue;
 629                        }
 630                        if (!strcmp(arg, "--branches")) {
 631                                for_each_branch_ref(show_reference, NULL);
 632                                continue;
 633                        }
 634                        if (!prefixcmp(arg, "--tags=")) {
 635                                for_each_glob_ref_in(show_reference, arg + 7,
 636                                        "refs/tags/", NULL);
 637                                continue;
 638                        }
 639                        if (!strcmp(arg, "--tags")) {
 640                                for_each_tag_ref(show_reference, NULL);
 641                                continue;
 642                        }
 643                        if (!prefixcmp(arg, "--glob=")) {
 644                                for_each_glob_ref(show_reference, arg + 7, NULL);
 645                                continue;
 646                        }
 647                        if (!prefixcmp(arg, "--remotes=")) {
 648                                for_each_glob_ref_in(show_reference, arg + 10,
 649                                        "refs/remotes/", NULL);
 650                                continue;
 651                        }
 652                        if (!strcmp(arg, "--remotes")) {
 653                                for_each_remote_ref(show_reference, NULL);
 654                                continue;
 655                        }
 656                        if (!strcmp(arg, "--local-env-vars")) {
 657                                int i;
 658                                for (i = 0; local_repo_env[i]; i++)
 659                                        printf("%s\n", local_repo_env[i]);
 660                                continue;
 661                        }
 662                        if (!strcmp(arg, "--show-toplevel")) {
 663                                const char *work_tree = get_git_work_tree();
 664                                if (work_tree)
 665                                        puts(work_tree);
 666                                continue;
 667                        }
 668                        if (!strcmp(arg, "--show-prefix")) {
 669                                if (prefix)
 670                                        puts(prefix);
 671                                else
 672                                        putchar('\n');
 673                                continue;
 674                        }
 675                        if (!strcmp(arg, "--show-cdup")) {
 676                                const char *pfx = prefix;
 677                                if (!is_inside_work_tree()) {
 678                                        const char *work_tree =
 679                                                get_git_work_tree();
 680                                        if (work_tree)
 681                                                printf("%s\n", work_tree);
 682                                        continue;
 683                                }
 684                                while (pfx) {
 685                                        pfx = strchr(pfx, '/');
 686                                        if (pfx) {
 687                                                pfx++;
 688                                                printf("../");
 689                                        }
 690                                }
 691                                putchar('\n');
 692                                continue;
 693                        }
 694                        if (!strcmp(arg, "--git-dir")) {
 695                                const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
 696                                static char cwd[PATH_MAX];
 697                                int len;
 698                                if (gitdir) {
 699                                        puts(gitdir);
 700                                        continue;
 701                                }
 702                                if (!prefix) {
 703                                        puts(".git");
 704                                        continue;
 705                                }
 706                                if (!getcwd(cwd, PATH_MAX))
 707                                        die_errno("unable to get current working directory");
 708                                len = strlen(cwd);
 709                                printf("%s%s.git\n", cwd, len && cwd[len-1] != '/' ? "/" : "");
 710                                continue;
 711                        }
 712                        if (!strcmp(arg, "--resolve-git-dir")) {
 713                                const char *gitdir = resolve_gitdir(argv[i+1]);
 714                                if (!gitdir)
 715                                        die("not a gitdir '%s'", argv[i+1]);
 716                                puts(gitdir);
 717                                continue;
 718                        }
 719                        if (!strcmp(arg, "--is-inside-git-dir")) {
 720                                printf("%s\n", is_inside_git_dir() ? "true"
 721                                                : "false");
 722                                continue;
 723                        }
 724                        if (!strcmp(arg, "--is-inside-work-tree")) {
 725                                printf("%s\n", is_inside_work_tree() ? "true"
 726                                                : "false");
 727                                continue;
 728                        }
 729                        if (!strcmp(arg, "--is-bare-repository")) {
 730                                printf("%s\n", is_bare_repository() ? "true"
 731                                                : "false");
 732                                continue;
 733                        }
 734                        if (!prefixcmp(arg, "--since=")) {
 735                                show_datestring("--max-age=", arg+8);
 736                                continue;
 737                        }
 738                        if (!prefixcmp(arg, "--after=")) {
 739                                show_datestring("--max-age=", arg+8);
 740                                continue;
 741                        }
 742                        if (!prefixcmp(arg, "--before=")) {
 743                                show_datestring("--min-age=", arg+9);
 744                                continue;
 745                        }
 746                        if (!prefixcmp(arg, "--until=")) {
 747                                show_datestring("--min-age=", arg+8);
 748                                continue;
 749                        }
 750                        if (show_flag(arg) && verify)
 751                                die_no_single_rev(quiet);
 752                        continue;
 753                }
 754
 755                /* Not a flag argument */
 756                if (try_difference(arg))
 757                        continue;
 758                if (try_parent_shorthands(arg))
 759                        continue;
 760                name = arg;
 761                type = NORMAL;
 762                if (*arg == '^') {
 763                        name++;
 764                        type = REVERSED;
 765                }
 766                if (!get_sha1(name, sha1)) {
 767                        if (verify)
 768                                revs_count++;
 769                        else
 770                                show_rev(type, sha1, name);
 771                        continue;
 772                }
 773                if (verify)
 774                        die_no_single_rev(quiet);
 775                as_is = 1;
 776                if (!show_file(arg, output_prefix))
 777                        continue;
 778                verify_filename(prefix, arg, 1);
 779        }
 780        if (verify) {
 781                if (revs_count == 1) {
 782                        show_rev(type, sha1, name);
 783                        return 0;
 784                } else if (revs_count == 0 && show_default())
 785                        return 0;
 786                die_no_single_rev(quiet);
 787        } else
 788                show_default();
 789        return 0;
 790}